吴春来^1,2,
王涛¹,
张士苹¹,
樊静^1,,
1. 河南师范大学环境学院 河南省环境污染控制重点实验室 黄淮水环境与污染防治教育部重点实验室, 新乡 453007;
2. 洛阳理工学院环境工程与化学学院, 洛阳 471023

作者简介: 吴春来(1979-),男,博士研究生,研究方向为环境分析化学,E-mail:chunlaiwu@126.com.

通讯作者: 樊静,fanjing@htu.cn

基金项目: 国家自然科学基金(21377036)
河南省科技创新杰出人才计划(144200510004)
河南省软科学研究项目(102400440069)


中图分类号: X171.5

Inhibition Kinetic Spectrophotometric Determination of Hydroquinone in Environmental Water Samples by Sequential Injection

Wu Chunlai^1,2,
Wang Tao¹,
Zhang Shiping¹,
Fan Jing^1,,
1. School of Environment, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Xinxiang 453007, China;
2. School of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China

Corresponding author: Fan Jing,fanjing@htu.cn

CLC number: X171.5

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摘要:在酸性条件下，利用对苯二酚能够阻抑碱性藏花红和溴酸钾反应的原理，联用顺序注射分析技术建立了快速测定环境水样中对苯二酚的新方法。在最佳实验条件下，对苯二酚的线性范围为0.05~1.50 μg·mL^-1，检出限为0.02 μg·mL^-1，完成一次分析循环总的试剂消耗仅为0.125 mL。该方法用于自来水、地表水和河水中对苯二酚的测定，结果与HPLC法所得结果对照，无显著性差异。
关键词: 对苯二酚/
环境水样/
顺序注射/
动力学光度法

Abstract:A new method for rapid determination of trace hydroquinone in environmental water samples is established by coupling the inhibition effect of hydroquinone on the rate of the reaction between potassium bromate and safranine in acid medium with sequential injection technology. Different sequential injection analysis parameters such as reagent concentration, injection sequence of reagent and sample, flow speed and coexisting species effect have been investigated in detail. It is found that under the optimum conditions, the linear range for hydroquinone determination is 0.05 - 1.50 μg·mL^-1, and the detection limit is 0.02 μg·mL^-1. Only 0.125 mL of reagent is needed in a single analysis cycle. The method has been used for the determination of trace hydroquinone in tap water, ground water and river water samples, and the results are in good agreement with those obtained from HPLC.
Key words:hydroquinone/
environmental water sample/
sequential injection/
kinetic inhibition spectrophotometry.